| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal pump capable of being fixedly attached by heating such as welding, brazing, and seizing, using a metal case and pipes with high airtightness, circulating refrigerant, a combustible fluid, a toxic fluid or the like in a closed circuit, and ensuring pressure resistance, airtightness, and corrosion resistance of the metal case and pipes.SOLUTION: A centrifugal pump comprises a metal body case 34, the body case 34 includes an upper body case 36; a lower body case 48; and a blade case separating an internal space S1 formed by the upper body case 36 and the lower body case 48, forming a fluid introduction flow passage 84 above, and forming a rotary portion accommodation space S2 accommodating a rotary blade member 12 below, and an end portion of the blade case 68 is fixedly attached to the upper body case 36 or the lower body case 48 in an airtight state.SELECTED DRAWING: Figure 1 |
